Patent US342072A successfully refreshed from Google Patents.
Patent US2396787A successfully refreshed from Google Patents.
US2396787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching mechanism
Assignee: Siemens Industry Inc
•
Filing: 1942-07-14
•
Granted: 1946-03-19
•
Expires: 1962-07-14
Abstract
No abstract record available.
Inventors
- 👤 Charles W Hawthorne
- 👤 George P Malm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:40
CPC Classifications
B; B21; B21B; B21B39/00; B21B39/14; B21B39/18; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20238
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-03-18 | 1949-09-17 | 1950-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-18 | 1953-09-17 | 1954-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-18 | 1957-09-17 | 1958-03-19 | $7700.00 | Window Closed / Lapsed |